*{
    margin: 0;
    padding: 0;
}
ol,li,ul{
    list-style: none;
}
a,a:hover,a:active,a:link{
    text-decoration: none;
    color: #333;
}

input,button,textarea{
    outline: none;
}
.container{
    width: 1200px;
    margin: 0 auto;
 
}


.footer,
.header{
    width: 1200px;
    margin: 0 auto;
    color: #fff;
    background-color: skyblue;
    height: 80px;
    font-size: 36px;
    
    position: relative;
}
.footer{
    height: 300px;
    font-size: 100px;
}
.header > div{
    font-size: 20px;
    height: 30px;
    width: 300px;
    position: absolute;
    top: 50%;
    right: 30px;
    transform: translateY(-50%);
    display: none;
    color: #333;
}

.header > div.active{
    display: flex;
}

.header > div >.username{
    color: red;
}

.header > div>span{
    margin: 0 10px;
}
.header > div > a{
    width: auto;
}

.header > div > a:hover {
    color: red;
}